Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: BSOD with error code "Stop: C0000221 Unknown Hard Error"

Enountered a BSOD that said something along the lines of "Unknown Hard Error" with the code in the title followed by the path: \systemroot\system32\ntdll.dll
It then said something about dumping physical memory to disk. I encountered this BSOD after I purposely powered down my machine and it had been turned off for a couple of hours.

All help is greatly appreciated.

p.s. I encountered an unhandled exception error when trying to run the SF diagnostic tool so I hope it completed sufficiently.

This one occurred while I was working on the computer. The message was a bit more extensive. I have attached the minidump to this reply. It stated something about any new hardware added lately which no new hardware has been added fro over a year. Could a hard drive being going bad? I currently have 2 SSDs in a RAID 0. The RAID management tool says the drives are healthy but that doesn't mean anything.

Seatool for dos: SeaTools | Seagate download
Burn it in a blank cd. boot from the CD, click on "Accept", wait for it to finish detecting the drives, then in the upper left corner select "Basic Tests", then select "Long Test" and let it run.

Sheesh! I got my work cut out for me! My intuition tells me you are right on the mark. I will get this done and get back with you guys. Thank you so much! This forum rocks! Even if this falls through you guys have pointed me in the right direction many a times.

BSOD with error code "Stop: C0000221 Unknown Hard Error"

SP1 won't install - "Unknown error" / "Service does not exist"Hello - I've repeatedly tried and failed to install Service Pack 1. I have run the update readiness tool, and have run chkdsk and sfc. I've tried installing through Windows Update, as well as downloading the standalone installer from Microsoft.
The former results in an "unknown error"; the...

Windows Updates & Activation

BSOD downloading heavy files / "stressing" Hard Drive error STOP 0x101I've read at least 3 or 4 different posts about this BSOD, however, every single stress test did not point out anything good... (Have tried each of them, memtest, prime95, drive verifier for at least 3 hours each...), however, I have thought pretty interesting things.
First, I used to have those...

Getting Blue Screen error"unknown hard error" in win7sorry about my english before.
I through to the point. I dont know exactly why this can be happened in my windows. I got screen saying :
nothing else and the system is stopped at the point. so i try to restart windows with power reset. Then restart with safe mode and system repair, but...